<template>
  <div>
    <div class="todo-header">
      <input
        type="text"
        placeholder="请输入你的任务名称，按回车键确认"
        @keyup.enter="add"
        v-model="title"
      />
    </div>
  </div>
</template>

<script>
import { nanoid } from 'nanoid'
export default {
  name: 'MyHeader',
  props: ['addTodo'],
  data() {
    return {
      title: ""
    }
  },
  methods: {
    add() {
      if (!this.title.trim()) return alert('输入不能为空')
      //将用户的输入包装成一个todo对象
      const todoObj = { id: nanoid(), title: this.title, done: false }
      // console.log(todoObj);
      this.addTodo(todoObj)
      this.title = ''
    }
  },
}
</script>

<style scoped>
/*header*/
.todo-header input {
  width: 560px;
  height: 28px;
  font-size: 14px;
  border: 1px solid #ccc;
  border-radius: 4px;
  padding: 4px 7px;
}

.todo-header input:focus {
  outline: none;
  border-color: rgba(82, 168, 236, 0.8);
  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075),
    0 0 8px rgba(82, 168, 236, 0.6);
}
</style>